\begin{tabular}{l*{6}c}
\toprule
 & \multicolumn{3}{c}{Means (std. dev.)} & \multicolumn{3}{c}{Differences (\textit{p}-values)}\\ \cmidrule(lr){2-4} \cmidrule(lr){5-7}
  & \shortstack{Control\\ group (C)} & \shortstack{Behavior\\ treatment (T\begin{math}_1\end{math})} & \shortstack{Norms\\ treatment (T\begin{math}_2\end{math})} & T\begin{math}_1\end{math} - C & T\begin{math}_2\end{math} - C & T\begin{math}_2\end{math} - T\begin{math}_1\end{math} \\
\midrule
Behavior belief&52.096&51.627&51.644&-0.470&-0.452&-0.017\\
&(21.339)&(21.213)&(21.391)&(0.486)&(0.503)&(0.980)\\
Norms belief&62.172&61.667&61.328&-0.505&-0.845&0.339\\
&(21.357)&(21.535)&(21.948)&(0.458)&(0.217)&(0.621)\\
Altruism&-0.008&-0.024&0.032&-0.016&0.040&-0.057*\\
&(0.982)&(0.984)&(1.032)&(0.600)&(0.206)&(0.076)\\
Patience&-0.020&0.005&0.015&0.025&0.035&-0.010\\
&(0.993)&(0.989)&(1.019)&(0.424)&(0.265)&(0.744)\\
Risk&-0.001&-0.005&0.006&-0.005&0.007&-0.011\\
&(0.989)&(1.011)&(1.000)&(0.887)&(0.827)&(0.719)\\
Pos. reciprocity&-0.018&0.021&-0.002&0.039&0.016&0.023\\
&(1.024)&(0.983)&(0.993)&(0.223)&(0.619)&(0.463)\\
Neg. reciprocity&-0.011&0.012&-0.001&0.023&0.011&0.013\\
&(0.999)&(0.978)&(1.023)&(0.455)&(0.733)&(0.692)\\
Trust&-0.028&0.017&0.010&0.045&0.038&0.007\\
&(1.001)&(1.000)&(0.999)&(0.156)&(0.229)&(0.825)\\
Rel. universalism&-0.027&0.021&0.006&0.047&0.032&0.015\\
&(0.987)&(1.020)&(0.993)&(0.138)&(0.303)&(0.639)\\
Age&48.114&47.350&47.847&-0.763&-0.266&-0.497\\
&(17.727)&(17.055)&(17.438)&(0.166)&(0.632)&(0.361)\\
Female&0.494&0.522&0.514&0.029*&0.020&0.008\\
&(0.500)&(0.500)&(0.500)&(0.071)&(0.202)&(0.593)\\
Log income&10.782&10.795&10.815&0.013&0.033&-0.020\\
&(0.882)&(0.879)&(0.858)&(0.645)&(0.236)&(0.471)\\
College degree&0.473&0.479&0.457&0.007&-0.015&0.022\\
&(0.499)&(0.500)&(0.498)&(0.676)&(0.335)&(0.166)\\
Employed&0.499&0.488&0.506&-0.012&0.007&-0.018\\
&(0.500)&(0.500)&(0.500)&(0.467)&(0.672)&(0.248)\\
Democrat&0.528&0.535&0.539&0.007&0.011&-0.003\\
&(0.499)&(0.499)&(0.499)&(0.640)&(0.497)&(0.833)\\
Northeast&0.170&0.165&0.174&-0.005&0.004&-0.009\\
&(0.376)&(0.372)&(0.380)&(0.692)&(0.717)&(0.447)\\
Midwest&0.204&0.211&0.216&0.007&0.012&-0.005\\
&(0.403)&(0.408)&(0.411)&(0.602)&(0.362)&(0.697)\\
South&0.390&0.385&0.365&-0.005&-0.025&0.020\\
&(0.488)&(0.487)&(0.482)&(0.743)&(0.105)&(0.196)\\
Parent&0.562&0.557&0.550&-0.005&-0.012&0.007\\
&(0.496)&(0.497)&(0.498)&(0.762)&(0.441)&(0.640)\\
& & & & & & \\ \textit{p}-value of joint \textit{F}-test & & & & 0.426 & 0.684 & 0.425  \\ & & & & & & \\ \hline
Observations & 1,987 & 1,995 & 2,018 & 3,982 & 4,005 & 4,013 \\
\bottomrule
\end{tabular}
